“It's tragic and unfortunate that Steve would make these grotesque comments so out of touch with reality and obviously so vindictive and the whole White House staff is deeply disappointed in his comments, which were grotesque,” Miller told CNN’s “State of the Union.”

The White House and President Trump have denounced Bannon and the book since excerpts began leaking last week.

“And the tragic thing about this book, and there are many things about it that are unfortunate, but the portrayal of the president in the book is so contrary to reality, to the experience of those who work with him, to my own experience having spent the last two years with him,” Miller said on Sunday.

Miller described Wolff as a "garbage author of a garbage book."

Revelations in the book and comments from administration staffers have consumed Washington since excerpts began leaking last week.